Speed-gearing.



No. 65|,296. t l Patented .lune 5, |900. G. H. B. ANLEs.

v SPEED GEARING.

(Application filed Sept. 13, 1899..)

WMQCSSCS 19069101.

Tn: Hemus PETERS co.. PHOTQMTNQ.. WASHINGTON. n. c.

' Nrrnn STATES GEORGE H. B. CNOLES, OF VHITE MARS-H, MARYLAND.

SPECIFICATION forming` part of Letters Patent No. 651,296, dated June 5, 1900.

Application filed September 18, 1899. Serial No. 730,348. (No model.)

To @ZZ whom t may concern:

Beitknown that I, GEORGE H. B. OANOLES, a citizen of the United States, residing at White Marsh, in the county of Baltimore and State of Maryland, have invented a new and useful Speed-Gearing, of which the following is a specification.

This invention relates to driving mechanism for bicycles in general, and more particularly to speed-gearings; and it has for one object to provide a simple and effective means for multiplying the speed of rotation of the chain-sprocket with respect to the rotation of the crank-axle.

A further object of the invention is to proy vide a construction which may be applicable to the usual bicycle-frame and which will,

' moreover, be compact in its structure.

In the drawings forming a portion of this specification and in which like numerals of reference indicate similar parts in both views, Figure 1 is a side elevation showing the application of the gearing to a bicycle-frame. Fig. 2 is a vertical section of Fig. 1, parts being shownl in elevation.

Referring now to the drawings, 5 represents the seat-tube, while 6 and 7, respectively, represent the bottom bar and a tierod, these parts of a bicycle-frame being connected in the usual manner at the crankhanger 8.

In the crank-hangerS and in suitable ballbearings is journaled a sleeve 9, at one end of which is fixed a sprocket 10, the outer face of which is provided with a hub 11, having an external gear 12 thereon. Within the sleeve 9 and having a ball-bearing connection 13 therewith is journaled a crank-shaft 14, upon which is fixed a gear-wheel 15, meshing with the minor element 16 of a cone-gear comprising a major element 17, meshing With the gear 12. This cone-gearis rotatably mounted upon a shaft 18, having fixed relation to the bifurcations 19 and 2O of a bifurcated extension 21 of a bracket, the arms 22 and 23 of which are provided with collars 24 and 25, fitted upon and secured to the seat-tube and bottom bar of the bicycle-frame. The crank shaft or axle le is provided with the usual cranks 26, and, as shown in Fig. 2, the toothed periphery 30 of the sprocket 10 lies over and encircles the gear 12, the outer face of the sprocket being dished for this purpose.

From the above description and uponreference to the drawings it will be seen that rotation of the shaft 14c will correspondingly move the gear 15 to rotate the cone-gear in the opposite direction. The engagement of the element 17 with the gear 12 will rotate the latter in an opposite direction to the conegear, or, in other words, in the same direction with the crank-axle. The sprocket 10, being fixed to or formed integral with the gear 12, will thus be rotated in the proper direction.

Furthermore, it will be seen that the diameter of the gear 15 is greatly in excess of that of the element 1G, the diameter of which in turn is less than that of the element 17, so that the sprocket 10 will be rotated at a greater speed than will the shaft14. Furthermore, it will be seen that the structure is compact, increasing the tread of the machine only very slightly, while the ball-bearings of the different parts reduce the friction to a minimum.

In practice the specific construction and arrangement shown can be varied, while any desired materialsand proportions may be used for the various parts without departing from the spirit of the invention.

lVhile the invention is shown as applied to a bicycle, it Will of course be understood that it may be attached to a vehicle of any kind and for any purpose.

What I claim is- The combination with a bicycle and the frame thereof, comprising a crank-hanger having a seat-tube and bottom bar connected therewith, of a sleeve rotatably mounted in the crank-hanger, a sprocket fixed to the sleeve and having a hub provided with a gear, the periphery of the sprocket being projected outwardly to inclose the gear, a crankshaft rotatably mounted in the sleeve and having a gear fixed thereto, a bracket in- IOO 

